EP0153259A1 - Polyvalenter Indikationsmechanismus zur Temperaturkontrolle - Google Patents

Polyvalenter Indikationsmechanismus zur Temperaturkontrolle Download PDF

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Publication number
EP0153259A1
EP0153259A1 EP85420023A EP85420023A EP0153259A1 EP 0153259 A1 EP0153259 A1 EP 0153259A1 EP 85420023 A EP85420023 A EP 85420023A EP 85420023 A EP85420023 A EP 85420023A EP 0153259 A1 EP0153259 A1 EP 0153259A1
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EP
European Patent Office
Prior art keywords
temperature
determined
passage
temperatures
dye
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Granted
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EP85420023A
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English (en)
French (fr)
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EP0153259B1 (de
Inventor
Jean-Vincent Jehanno
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Civile "gir" Ste
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Civile "gir" Ste
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Priority to AT85420023T priority Critical patent/ATE47226T1/de
Publication of EP0153259A1 publication Critical patent/EP0153259A1/de
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Publication of EP0153259B1 publication Critical patent/EP0153259B1/de
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/06—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using melting, freezing, or softening
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
    • G01K5/483—Measuring temperature based on the expansion or contraction of a material the material being a solid using materials with a configuration memory, e.g. Ni-Ti alloys

Definitions

  • the present invention relates to a versatile process for controlling temperatures. It applies to any object, any product, any machine, the quality or reliability of which depends essentially on compliance with given temperatures.
  • This control must itself meet reliability and profitability criteria; it must be carried out continuously for all or part of the manufacturing-storage-distribution-sale chain of a product, or even throughout the operation of a machine.
  • the present invention proposes an original solution by its very design; it is a mechanical process with multiple functions which addresses the following problem: being able to record temperature variations during the life of a product or the operation of a machine.
  • the blood is taken at + 37 ° C, it must be stored between + 2 ° C and + 6 ° C (average storage temperature + 4 ° C) and then used at room temperature, approximately + 22 ° C.
  • the product is manufactured (treated or sampled) at a manufacturing temperature (T f ) lower than its storage temperature (T), itself lower than the use temperature (T u ).
  • the processing of frozen products is a typical example of the relation T u > T s > T c > T f . They must in fact be manufactured at low temperatures of the order of - 35 ° C, then stored at temperatures below - 15 ° C and then warmed up for use.
  • US patent 15 35 536 uses a body whose melting temperature is that, limit, not to be exceeded for storage. This body is combined with a dye, so that if the storage temperature reaches this limit temperature, the body liquefies and becomes colored on contact with the dye. This coloration, which makes it possible to visualize the limit temperature, is irreversible, even if, subsequently, the temperature drops and only consecutively the body solidifies again.
  • French patent n ° 15 15 914 is a typical example. It is a process concerning the control of the conservation of frozen or deep-frozen products, a process which improves and supplements that described in a previous patent of one of the applicants (n ° 1391 673 of 7.12.62.). The difference is that, if in the previous patent (n ° 1 391 673), the witness must be stored at low temperature to avoid it accidentally liquefying, on the other hand, in the patent (1 515 914), an armament of the system is designed to avoid storage at low temperatures.
  • the weapon consists of a thin capsule containing the liquid, which is thus separated from the dye at room temperature.
  • the liquid solidifies and breaks the bulb: it is then in contact with the dye (or absorbent paper if the liquid is already dye), but it is solid and non-porous, nothing is happening. On the other hand, if the temperature rises above the critical threshold, the solid becomes liquid again and the coloration is then visible.
  • the object of the present invention is to remedy these drawbacks.
  • the object is achieved in that, in the process intended for controlling determined temperatures according to the invention which is of the type in which the exceeding of a determined temperature is indicated by an irreversible coloring. coloring is triggered using an element made of a shape memory alloy.
  • shape memory alloys are alloys which can undergo a deformation of several percent (up to 10% in some cases) in a certain range of temperatures and find fully their initial shape after reheating. This effect is associated with a reversible structural transformation of martensitic type which occurs between the deformation temperature and the temperature to which the sample is heated.
  • Martensitic transformations involve macro scopic deformations which disappear during the inverse transformation.
  • this martensitic type transformation takes place at decreasing temperature, it begins at a temperature ⁇ 1 and becomes complete at a temperature ⁇ 2 .
  • the inverse transformation begins at a temperature ⁇ 3 (greater than the temperature ⁇ 2 ) and ends at a temperature 94 (greater than the temperature ⁇ 1 ) if there is a hysteresis phenomenon.
  • the temperatures 9j and ⁇ 2 are respectively equal to the temperatures ⁇ 4 and 9 3 .
  • each temperature between the limit temperatures ⁇ 1 and 9 2 corresponds a certain rate of transformation of martensitic type, independent of time, and consequently a certain rate of deformation A% of the alloy, the maximum deformation being well obviously obtained at temperature ⁇ 2 .
  • the coloring will be at a determined temperature triggered by the deformation of a shape memory alloy at this determined temperature.
  • the torch memory alloy undergoes a structural transformation, of martensitic type. accompanied by deformation and reestablishes communication between the chambers containing the body liquid at this temperature and the dye (s).
  • the body, liquid is therefore colored, which makes it possible to visualize that the determined temperature has been reached.
  • the body associated with this determined temperature has a melting temperature substantially equal to that determined and the martensitic type transformation of the associated shape memory alloy is carried out with hysteresis.
  • the same dye can be associated with different bodies.
  • a shutter made of an iorme memory alloy being associated with each body and closing the passage between the chamber containing this body and that containing the dye.
  • each body associated with a determined temperature. and liquid at this temperature, and each dye associated with this body and therefore at a determined temperature is placed in a respective separate chamber formed inside the housing, these chambers communicating with each other using at least one passage and being separated by at least one piston-type device actuated by at least one spring formed from a shape memory alloy whose transiormanon temperature is substantially equal to that determined, the piston-type device being moved under the effect of the spring between a position in which it frees the passage (s) between the chambers containing each body and each dye associated with this determined temperature, and a position in which it closes this (or these) passage (s).
  • the spring formed in this alloy lengthens or shortens when the transformation temperature of the alloy is reached.
  • the transtormation temperature of which is substantially equal at the determined temperature higher to indicate the different deformations of this spring at the different determined temperatures are used to trigger each coloring corresponding to each determined temperature.
  • a fragile capsule containing a dye is placed inside the chamber containing the body associated with a determined temperature, this capsule being capable of being broken by the piston-type device when the determined temperature is reached.
  • an assembly whose shape has been judiciously chosen allows self-arming of the indicating device when this determined threshold temperature is reached, during the transition from the manufacturing temperature to the storage temperature.
  • These self-cocking means prevent the coloring from occurring during the passage from this manufacturing temperature to the storage temperature, but allow this coloring to be triggered when. later, this threshold temperature is reached from the storage temperature.
  • the sealing means can be formed, for example, by an ejectable plug or by a disturbable cord.
  • Indicative devices can be combined with one another in multiple ways, in order to obtain indicator devices capable of indicating different determined temperatures.
  • FIG 3 illustrates by a diagram the different temperatures reached by the blood bags at different stages of their manufacture and use, that is to say the temperature variations (T) of this product as a function of time (t).
  • the blood is taken at a temperature of 37 ° C (To), it is packaged in bags and then its temperature is lowered to 4 ° C which constitutes its storage temperature (T1). This blood is stored for a certain time, during which its temperature should not go down above 6 ° C (T2) or fall below 2 ° C (T3). Finally, it must be brought to a temperature of at least 20 ° C (T4) before being used.
  • Figure 4 shows a first embodiment of the indicator device according to the invention, applied to temperature control for the preservation of blood.
  • the blood must be maintained between 2 ° C and 6 ° C to maintain all its qualities, the indicating device must be able to indicate if these temperatures have been exceeded while being able to be associated with blood bags from their manufacture.
  • the indicator (2) is essentially presented in the form of a housing (3) which is completely or partially transparent and which can be, for example, made of polystyrene or another synthetic material.
  • This box (3) internally celebrates three rooms (4.5.6) containing respectively a first body whose melting point is at 6 ° C, a dye and a second liquid body at 2 ° C, this body may be water.
  • the chambers (4) and (5) communicate by means of a passage (7).
  • the chambers (5) and (6) communicate by means of a passage (8).
  • passages (7) and (8) are closed respectively by a plug (9) in a first shape memory alloy whose transformation point is substantially at 6 ° C. and by a plug (10) in a second memory alloy whose transformation point is at 2 ° C.
  • the indicator (2) When the blood is drawn, it is at a temperature of 37 ° C. the indicator (2) is fixed to the blood bag, for example by stapling so that it cannot be replaced later by another indicator.
  • the blood bag once filled, is brought to its storage temperature of 4 ° C.
  • the threshold temperature of 6 ° C When changing from 37 ° C to - ° C. the threshold temperature of 6 ° C is reached.
  • the first alloy forming the plug (9) undergoes a shrinkage due to its transformation and therefore releases.
  • the passage (7) between the chambers (4) and (5) However at this same temperature of 6 ° C. the first coros, which can be benzene, tetradecane ... etc. solidifies and is not porous. is not colored by the dye that the chamber (5).
  • the first body contained in the chamber (4) receives liquid and becomes colored on contact with the dye of the chamber (5).
  • the plug (9) being further narrowed, due to the hysteresis accompanying the transformation of the first shape memory alloy.
  • the temperature crossing can therefore be detected visually by the coloring of the first body.
  • the second shaped alloy is in turn transformed with shrinking and frees the passage (8) between the chambers (5) and (6).
  • the second body contained in the chamber (8) therefore colors on contact with the dye and as before. exceeding the threshold temperature is indicated by the coioration of the second body.
  • the dye used must be compatible with each of the bodies used, this dye can be formed by a food coloring, an acid-base indicator, etc. It could also be formed by colored beads capable of mixing with liquid bodies, or by any other similar device capable of indicating a coloration.
  • This temperature indicator reacts very quickly when a threshold temperature is exceeded, milk that the martensitic transformation is very fast.
  • an increase in the response time of this indicator depending on the conditions set by the users, can be obtained very simply and easily by varying, for example, the thickness of the polystyrene case (3).
  • the plugs (9.10) can have any shape. They can in particular have the shape of blades extending over a whole cross section of the housing between the chambers respectively (4 and 5) and (5 and 6).
  • FIGS 5 and 6 illustrate another embodiment of this temperature indicator.
  • the indicator (12) of Figure 5 comprises a housing (13).
  • This housing (13) defines using a piston (17) essentially three chambers (14.15.16).
  • These chambers (14.15.16) contain, as in the previous example, respectively a first body whose melting point is at 6 ° C, a dye and a second liquid body at 2 ° C. this body can be water.
  • a fragile capsule (1S) containing a dye, identical to that of the chamber (15) or different is housed inside is cnamore (16).
  • the piston (17) occupies the entire cross section of the housing (13). it is actuated by a spring (19) of a term memory alloy whose point of start of structural transformation S 1 is at 5 ° C and whose point of completion of this transformation S 2 is less than 2 ° C, this transformation being effected with hysteresis and the spring (19) decreasing in length during the latter.
  • the piston (17) When the spring (19) decreases in length, the piston (17) accompanies its movement.
  • This piston (17) is shaped so that at the start of its movement, at 6 ° C. it frees the passage between the chambers (14) and (15) and that at the end of its movement at 2 ° C. it compresses the fragile capsule (18) and breaks it so as to bring the dye contained therein into contact with the second body contained in the chamber (16).
  • the length of the spring (19) is such that the piston (17) isolates the chambers (15) and (14). and exerts no compressive force on the fragile capsule (18).
  • the first body becomes liquid: the passage between the cilambers (14) and (15) being free a coloring is observed.
  • the piston (17) compresses the capsule (1S) and breaks it, since the spring (19) continues to shorten (9 2 ⁇ 2 ° C) and the second body contained in the chamber (16) is colored.
  • this shape memory alloy must also have a transformation with hysteresis. in order to obtain a coloration for 6 ° C.
  • An alloy of type 69.9% Cu 26.1% n and 4% A1 would be suitable.
  • FIG. 6 shows a temperature indicator (22) using, like that of FIG. 5, a single element in shape memory alloy, the transformation of which takes place with hysteresis and having substantially the same structure as this indicator (12 ), that is to say comprising three chamores (24.25.26) respectively containing a first body whose melting point is at 6 ° C, a dye and a second liquid body at 2 ° C. an ecant dye also contained in a fragile capsule (28) housed in the chamber (26).
  • the spring (29) is made of an alloy whose transformation of the martensitic type takes place with elongation, always from 6 ° C., so that the element acting on the capsule (28) and used to separate the chambers (24) and 25) no longer has the shape of a piston but of a lever (27) pivotally mounted about an axis (30).
  • This temperature indicator (22) works in the same way as the previous indicator: when the temperature rises above 6 ° C, the spring (29) remains elongated due to the hysteresis: the body (24) melts and the dye (25) can then mix with it: when the temperature drops below 2 ° C, the elongation of the spring (29) is such that the pressure exerted by the lever (27) on the capsule (2S) causes the rupture thereof and therefore the coloring of the second body contained in the chamber (26).
  • the response time of these indicating devices (12.22) can be reduced by varying, for example, the thickness of the casing in polystrene or other synthetic material, or by adding an insulating material.
  • this springs in form memory alloys allows to exert a force this significant compression on the fragile capsule: so that these capsules can be chosen sufficiently resistant to eliminate any risk of rupture of these during transport or handling.
  • This indicator device (32) comprises a housing (33) made of Poiystyrene or other synthetic material, at least partially transparent. As for the indicators (2), (12) and (22), the housing (33) delimits three chambers (34.35.36).
  • the chambers (34) and (36) contain a liquid body respectively at temperatures of 6 ° C and 2 ° C, and which can be formed by water, the chamber (35) contains a dye.
  • Passages (39.40) are provided respectively between the chambers (34.35) and (35.36).
  • a piston (37) actuated by a spring (38) and having substantially the shape of a T, is able to move in the chamber (35) and to close or release, as it moves, the passages (39,40).
  • Reinforcements (33a) of the housing (33) at each passage (39.40) form a guide for the piston (37) during its movements.
  • a stopper (41) or a transparent film which can be perforated blocks the passage (39).
  • the spring (38) is made from a shape memory alloy whose martensitic type transformation begins at 6 ° C and ends after 2 ° C (9 2 ⁇ 2 ° C), this transformation being carried out without hysteresis and with shrunk, such properties are obtained with certain ternary alloys of copper, zinc and aluminum.
  • the piston (37) closes the passage (40) between the chambers (36) and (35).
  • the passage (39) between the chambers (34) and (35) being closed only by a plug or perforable film (41), and the spring (38) is in the rest state.
  • the spring (3S) begins to shorten at 6 ° C
  • the piston (37) which is linked to this spring, is driven by it to the right in the figure. it ejects the plug (41) (or perforates the film as appropriate) and reaches an intermediate position at 4 ° C. in which it closes both the passage (39) and the passage (40) and prevents any communication between the chambers (34) and (35) and (35) and (36), and therefore any coloring.
  • Ramps (33b) can be provided at the passage (39) to facilitate the ejection of the plug (41).
  • the spring (38) undergoes the reverse transformation, with elongation.
  • the piston (37) is then moved to the left in Figure 10 so as to return to the initial position it occupied at 37 ° C (for example) and to close the passage (40) and to release the passage (39) .
  • the passage between the chambers (35) and (34) is free and a coloration is obtained in the chamber (34) indicating that the temperature of 6 ° C has been reached. This is possible because the spring does not exhibit a hysteresis phenomenon.
  • the removable stopper (41) is designed to block the passage (39) and prevent any coloring during the passage of the 6 ° C threshold when the temperature of the product is lowered to its storage value.
  • shape memory alloy could also be chosen so that its transformation is effected with elongation and not constriction.
  • FIG. 11 shows an indicating device (42) of the same type as the indicating device (32) intended to indicate three temperatures instead of two.
  • This indicating device (42) can always be used to monitor the temperatures reached by a blood bag and in particular to indicate the temperature of 22 ° C to which a blood bag, which has just been stored before being used.
  • This device has substantially the same shape as the previous device (32). Like this one, it shows a case (43), three chambers (44.45,46).
  • the rooms (44.46) contain water.
  • the chamber (45) a dye.
  • the passages (49.50) between these chambers (44,45,46) can be closed respectively by a piston (47) ot or by a plug (51) or transparent film which can be neutralized.
  • the piston (47) is actuated by a spring (48) of a memory alloy, this torch whose temperature at the start of transtormation is 22 ° C. this transtormation being carried out without hysteresis and with shrinking, and the flax of this translormation being obtained for a temperature below 2 ° C.
  • guides (43a) are provided for the piston (47) during its movements, as well as ramps (43b) for ejecting the plug (51).
  • Two additional chambers (52,53) are also provided between the chambers (45) and (44), one of these chambers (52) being able to be confused with the chamber (45).
  • These chambers (52.53) each contain a dye or a liquid having a primary color, for example red, yellow respectively.
  • This device (42) operates in the same way as the previous device.
  • the spring (48) begins to retract as soon as the temperature of 22 ° C is reached. and the piston (47) moves to the right.
  • the piston releases the passage between the chambers (46) and (45) and a coloring is obtained in the chamber 46. If the temperature rises. the spring lengthens and the piston (47) moves to the left. when it reaches 6 ° C. the chamber (53) is in communication with the chamber (44) and a yellow coloring is obtained. If the temperature reaches 22 ° C, the piston (47) also frees the passage between the chambers (52) and (44) and an orange coloration is obtained in the chamber (44), this coloration indicating that the temperatures of 6 ° C and 22 ° C have been reached.
  • This device can obviously be adapted to all kinds of temperatures, however if the difference between two temperatures to be indicated is too large and exceeds approximately 30 degrees, it is no longer possible to indicate these two temperatures using '' a single spring made of a shape memory alloy. It is then possible to combine two shape memory springs, the martensitic type of transformation of which take place in zones of complementary temperatures.
  • the two springs will shorten and elongate in turn this role and will intervene to determine different temperatures.
  • Figure 12 shows a substantially dentic indicator device (60) at the indicator device (42) in which the same elements are also indicated by identical references.
  • the chambers (52) and (53) no longer communicate with the same chamber (44) but with two separate chambers. respectively (54) and (55). Therefore, they are slightly offset in space and each provided with a shutter respectively (56,57) which can be ejected by a piston (58).
  • the piston (58) thus has a slightly different shape and has substantially the shape of an E able to plug with each of its upper branches the passages between the chambers (54,55) and (52,53).
  • the temperatures of 6 ° C and 22 ° C are then indicated by different or equal colors in the rooms respectively (55.54).
  • the chambers containing water or another body and dye can be reversed. or certain chambers can be left empty: coloring can also be indicated using beads, colored powders passing from one chamber to another or powdered dyes diluting with the liquids contained in other chambers. ..without departing from the framework of the present invention.
  • the manufacturing temperature plus one or more threshold temperatures plus a usage temperature the manufacturing temperature plus one or more threshold temperatures plus a usage temperature:
  • This application extends to the food sector, for example to the control of frozen and deep-frozen products.
  • Figures 14 to 17 show an indicator device (62) of the same type as the indicator device (42). allowing to indicate four different temperatures: namely a freezing temperature, and three threshold temperatures for example: - 15 ° C. - 10 ° C. and - 5 ° C.
  • This indicator device (62) has substantially the same structure as the indicator device (42) and its elements identical to that of this device (42) are indicated by the same references. It further comprises an additional chamber (64) containing a dye having a primary color different from that of the chambers (52) and (53) and which can for example be blue.
  • the spring (6S) used in this device (62) is made of a shape memory alloy. presenting a hysteresis of fifteen cegrés.
  • This device (62) operates in the same way as the device (42). At room temperature ( Figure 14). the communications between the different chambers (44. 45. 46. 52. 53. 64) are closed using this piston (47) and the plug (51).
  • a coloration is obtained in the chamber (46) and indicates that the temperature of - 35 ° C has been reached. (See Figure 15).
  • the chambers (53.52) are successively placed in communication with the chamber (44) due to the displacement of the piston (47) and successively green (blue - jsune) and brown (ert. red) colorings are obtained in the chamber ( 44).
  • the liquids used must remain liquid at this very low temperature (up to - 35 ° C). they will be formed by alcoholic mixtures whose solidification points are very low.
  • This mechanism is suitable for also locating the temperature for use if it is not more than thirty Celsius degrees from the storage temperature. Otherwise, it will be necessary to associate two (or more) memory springs as we have previously considered (in connection with Example 2).
  • the speed curve (V 3 ) is described by a series of rapid descents, interrupted by the action of shape memory alloys preset to the selected thresholds (T l , T 2. T 3 , T 4 , T 5 , T 6 ...), and can practically overlap the desired speed curve (V 1 ).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Control Of Temperature (AREA)
  • Road Signs Or Road Markings (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Thermistors And Varistors (AREA)
  • Pens And Brushes (AREA)
EP85420023A 1984-02-14 1985-02-11 Polyvalenter Indikationsmechanismus zur Temperaturkontrolle Expired EP0153259B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85420023T ATE47226T1 (de) 1984-02-14 1985-02-11 Polyvalenter indikationsmechanismus zur temperaturkontrolle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8402905 1984-02-14
FR8402905A FR2560992B1 (fr) 1984-02-14 1984-02-14 Mecanisme indicateur polyvalent pour le controle de temperatures

Publications (2)

Publication Number Publication Date
EP0153259A1 true EP0153259A1 (de) 1985-08-28
EP0153259B1 EP0153259B1 (de) 1989-10-11

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Application Number Title Priority Date Filing Date
EP85420023A Expired EP0153259B1 (de) 1984-02-14 1985-02-11 Polyvalenter Indikationsmechanismus zur Temperaturkontrolle

Country Status (7)

Country Link
US (1) US4664056A (de)
EP (1) EP0153259B1 (de)
JP (1) JPS60242332A (de)
AT (1) ATE47226T1 (de)
DE (1) DE3573654D1 (de)
ES (1) ES8700435A1 (de)
FR (1) FR2560992B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664383A1 (fr) * 1990-07-03 1992-01-10 Eugedia Laboratoire Indicateur visuel de franchissement d'une temperature.
FR2672123A1 (fr) * 1991-01-29 1992-07-31 Vernet Procedes Dispositif d'indication visuelle irreversible du premier depassement d'une temperature de consigne, pour produits de conservation delicate.

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6027650A (ja) * 1983-07-21 1985-02-12 日本碍子株式会社 セラミックス製品に形状記憶効果を生ぜしめる方法
JPH02644U (de) * 1988-06-13 1990-01-05
FR2637370B1 (fr) * 1988-10-04 1991-04-12 Gir Dispositif pour le controle de temperatures contenant au moins un element en alliage a memoire de forme
US5034233A (en) * 1989-12-11 1991-07-23 Mccloy Jr John P Frozen food thaw detector
US5695284A (en) * 1994-06-22 1997-12-09 Waters; Gary H. Thaw indicator unit and method of manufacture
US5487352A (en) 1994-09-21 1996-01-30 John R. Williams Temperature indicator for cooked meats
US6682521B2 (en) 2000-03-23 2004-01-27 Dennis N. Petrakis Temperature activated systems
US7607402B2 (en) 2001-03-23 2009-10-27 Petrakis Dennis N Temperature responsive systems
US7655001B2 (en) * 2001-03-23 2010-02-02 Petrakis Dennis N Temperature responsive systems
US7445616B2 (en) * 2001-03-23 2008-11-04 Petrakis Dennis N Temperature responsive systems
GB0116653D0 (en) * 2001-07-07 2001-08-29 Temp Tell Ltd Time temperature indicators linked to sensory detection
EP1438554A1 (de) * 2001-10-04 2004-07-21 Koninklijke Philips Electronics N.V. Datenträger mit anordnung zur indikation von einem parameter das den datenträger beeinflusst
US20030123519A1 (en) * 2001-12-19 2003-07-03 Uriel Bachrach Device for monitoring a predetermined temperature
US7476224B2 (en) * 2003-03-17 2009-01-13 Petrakis Dennis N Temperature responsive systems
EP1625369A1 (de) * 2003-04-24 2006-02-15 Tatiana Maciulis Dip Anzeigesensor für die bestandskontrolle
US6957693B2 (en) * 2003-12-12 2005-10-25 Honeywell International, Inc. Heat exchanger thermal indicator
US7475653B2 (en) * 2004-09-24 2009-01-13 Drummond Scientific Company Sealed-system critical temperature indicator
US7097353B2 (en) * 2004-10-12 2006-08-29 Wieder Horst K Method and device for indicating temperature
US20060130735A1 (en) * 2004-12-16 2006-06-22 Beech Tree Sensors Llc Temperature sensor
EP1729103A1 (de) * 2005-06-03 2006-12-06 Fu-Go Verfahren und Vorrichtung zur Detektierung eines Temperaturanstieges in einem gekühlten Raum
US8361410B2 (en) * 2005-07-01 2013-01-29 Honeywell International Inc. Flow metered analyzer
US7387438B2 (en) * 2005-11-02 2008-06-17 Robert Parker Reusable, resettable, critical temperature indicator
USD573043S1 (en) 2007-09-13 2008-07-15 Ralph Gregory Knight Temperature monitor for freezers and coolers
US20090139722A1 (en) * 2007-11-30 2009-06-04 Baker Hughes Incorporated Capillary actuator device
US8037354B2 (en) 2008-09-18 2011-10-11 Honeywell International Inc. Apparatus and method for operating a computing platform without a battery pack
US20110011330A1 (en) * 2009-07-20 2011-01-20 Drummond Scientific Company Dual-Temperature, Sealed-System Critical Temperature Indicator
WO2011080375A1 (en) * 2009-12-31 2011-07-07 Valtion Teknillinen Tutkimuskeskus Tampering detector and method
TWI416085B (zh) * 2010-07-28 2013-11-21 Univ Lunghwa Sci & Technology 不可逆的溫度指示計
US10260956B2 (en) * 2012-06-15 2019-04-16 Freshpoint Quality Assurance Ltd. Time and/or temperature sensitive devices and methods of use thereof
AU2013101807A4 (en) 2012-12-10 2019-05-02 Mti Group Pty Ltd Temperature Sensitive Indicia for Dangerous Goods
DE102016005070A1 (de) * 2016-04-27 2017-11-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zur Temperaturüberwachung einer kryokonservierten biologischen Probe
DE102016005133A1 (de) 2016-04-27 2017-11-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zur Temperaturüberwachung einer kryokonservierten biologischen Probe
DE102016005075A1 (de) 2016-04-27 2017-11-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zur Temperaturüberwachung einer kryokonservierten biologischen Probe
DE102016005078A1 (de) 2016-04-27 2017-11-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zur Temperaturüberwachung einer kryokonservierten biologischen Probe
GB2552167A (en) 2016-07-11 2018-01-17 Intray Ltd Time temerature indicator label
US11561137B1 (en) * 2021-10-12 2023-01-24 University Of Sharjah Apparatus for thaw detection of a frozen item and method of manufacturing the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483752A (en) * 1967-02-10 1969-12-16 Avco Corp Temperature monitor
US3664582A (en) * 1969-10-29 1972-05-23 Robertshaw Controls Co Non-linear temperature responsive valve assemblies
EP0098646A2 (de) * 1982-07-05 1984-01-18 Leuven Research & Development V.Z.W. Kälteempfindliches Relais

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3403238A (en) * 1966-04-05 1968-09-24 Navy Usa Conversion of heat energy to mechanical energy
FR1515914A (fr) * 1966-09-20 1968-03-08 Potasse & Engrais Chimiques Nouveaux dispositifs pour contrôler la température de conservation de produits congelés et emploi de ces dispositifs
DE1573279C3 (de) * 1966-12-19 1975-08-14 Michel-Werke Kg, 8900 Augsburg Vorrichtung zum Anzeigen einer kritischen Temperaturerhöhung
US3516082A (en) * 1967-06-09 1970-06-02 Roy G Cooper Temperature sensing devices
JPS506021Y2 (de) * 1971-09-28 1975-02-20
US3844248A (en) * 1973-05-22 1974-10-29 J Parker Devices and processes for warning against impending rockfalls in underground excavation
US4038936A (en) * 1975-10-09 1977-08-02 Kessler Jane R Condition change indicator
JPS5281724A (en) * 1975-12-29 1977-07-08 Texas Instruments Inc Heat answering valve controlled by temperatures at two points
US4325217A (en) * 1980-01-21 1982-04-20 The United States Of America As Represented By The United States Department Of Energy Solid state engine with alternating motion
US4490976A (en) * 1981-10-02 1985-01-01 Johnson Alfred D Two-way shape memory alloy heat engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483752A (en) * 1967-02-10 1969-12-16 Avco Corp Temperature monitor
US3664582A (en) * 1969-10-29 1972-05-23 Robertshaw Controls Co Non-linear temperature responsive valve assemblies
EP0098646A2 (de) * 1982-07-05 1984-01-18 Leuven Research & Development V.Z.W. Kälteempfindliches Relais

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664383A1 (fr) * 1990-07-03 1992-01-10 Eugedia Laboratoire Indicateur visuel de franchissement d'une temperature.
FR2672123A1 (fr) * 1991-01-29 1992-07-31 Vernet Procedes Dispositif d'indication visuelle irreversible du premier depassement d'une temperature de consigne, pour produits de conservation delicate.
EP0497638A1 (de) * 1991-01-29 1992-08-05 Vernet Vorrichtung zur visuellen und irreversiblen Anzeige einer ersten Solltemperaturüberschreitung für Produkte mit heikler Konservierung

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FR2560992A1 (fr) 1985-09-13
JPH0530207B2 (de) 1993-05-07
FR2560992B1 (fr) 1987-05-15
US4664056A (en) 1987-05-12
ES8700435A1 (es) 1986-10-16
DE3573654D1 (en) 1989-11-16
ATE47226T1 (de) 1989-10-15
ES540350A0 (es) 1986-10-16
EP0153259B1 (de) 1989-10-11
JPS60242332A (ja) 1985-12-02

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